ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 57 



is placed at the apical margin and is connected with the nucleus by a 

 double rhizoplast. What is shown is that the blepbaroplast plays the 

 part of a centrosome, and the chief importance of the observation lies in 

 the evidence it brings as to the simple achromatic nature of this struc- 

 ture. This is in line with Hertwig's view that the centrosome is simply 

 an individualized corpuscle of achromatic nuclear substance. According 

 to Hertwig's general idea, the chromatic and achromatic substances are 

 distinct and separated out in the nucleus, while in the cytoplasm the 

 same two substances are present in some sort of combination. 



Protozoa. 



British Rhizopods."' — J. M. Brown communicates some observations 

 on new and little-known British Rhizopods — GochUopodium granulatum 

 Penard, Nehela scotica sp. n. and three other species, CapselUna timida 

 sp. n., Euglypha bnjophila sp. n., Amphitrema ivrightianum Archer, and 

 some others. 



Rhizopoda of Clare Island. f — G. H. Wailes and E. Penard report 

 on 13o species and varieties from Clare Island. About 90 species form 

 new records for Ireland, 16 for Great Britain. The authors describe 

 Gryptodiffiwjia e'boraciencis sp. n., several new species of Euglypha, and 

 new varieties of Cyphoderia. Five exclusively northern hemisphere 

 species are found in the Clare Island district :— Etiglypha irackiata Leidy, 

 Nehela bigibbosa Penard, N. barbata Leidy, Quadrida symmetrica var. 

 irregularis Penard, and Sphenoderia macrolepis Leidy. 



Foraminifera of the North Pacific.^ — J- A. Cushman continues 

 his monograph, and deals with the family Textulariidse. It Las been 

 found necessary to describe several new species and to erect a few new 

 genera, but the number of these has been kept as small as possible. 

 " More strikingly perhaps than in the first part the various faunal areas 

 are shown by the species of the Textulariida;. ]\Iany of the species 

 occurring in the Indo-Pacific region extend southward in the region of 

 Torres Strait. In the North Pacific, however, these species are, as a 

 rule, confined to the western portion from southern Japan southward. 

 The re-discovery of some of the species described by Brady, from almost 

 the exact locality at which they were dredged by the ' Challenger,' is 

 very interesting, and tends to show the restricted distribution of certain 

 forms." 



Victorian Foraminifera. §— Frederick Chapman gives a general in- 

 troduction to the study of Victorian Foraminifera, calling attention to 

 such points as the absence of the genus Nummnlites from the Austral- 

 asian Tertiary fauna, the fistulose oral outgrowths on the shells of some 

 Polymorphin^e which appear to point to the RamuUna type. He gives 

 practical directions for collecting, sorting, and mounting. 



• Journ. Linn. Soc. (Zool.) xxxii. (1911) pp. 77-85 (1 pi.). 

 t Proc. R. Irish Acad., xxxi. (1911) pt. 65, pp. 1-64 (6 pis.). 

 X U.S. Nat. Museum, Bull. 71 (1911) pp. 1-108 (156 figs.). 

 § Victorian Nat., xxvi. (1910) pp. 190-5 (1 pi.). 



